package com.github.sommeri.less4j.grammar;
import static com.github.sommeri.less4j.grammar.GrammarAsserts.assertChilds;
import static com.github.sommeri.less4j.grammar.GrammarAsserts.assertValid;
import static com.github.sommeri.less4j.grammar.GrammarAsserts.assertValidSelector;
import org.junit.Test;
import com.github.sommeri.less4j.core.parser.LessLexer;
import com.github.sommeri.less4j.core.parser.ANTLRParser;
import com.github.sommeri.less4j.core.parser.ANTLRParser.ParseResult;
/**
* Testing selectors parser.
*
* Note: strange things happen with EOF during unit tests, so I added a dummy
* { to the test selectors. The generated lexer thinks that there should be
* something after selector. That is true, but I want to test selector rule only.
*
* Note: CSS3 pseudoclasses and pseudoelements are not properly handled for now:
* * https://developer.mozilla.org/en/CSS/:after
* * selectors grammar http://www.w3.org/TR/css3-selectors/#gen-content
* * http://www.w3.org/wiki/CSS3/Selectors#Pseudo-classes
* * http://www.w3.org/TR/selectors/
*
*/
public class SelectorsGrammarTest {
@Test
public void emptyCombinator() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("h1 h2 {", null);
assertValidSelector(result);
}
@Test
public void spacelessCombinator() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("h1>h2 {", null);
assertValidSelector(result);
}
@Test
public void spacedCombinator() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("h1 + h2 {", null);
assertValidSelector(result);
}
@Test
public void afterCSS2() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:after {", null);
assertValidSelector(result);
assertChilds(result.getTree(), LessLexer.EMPTY_COMBINATOR, LessLexer.SIMPLE_SELECTOR);
}
@Test
public void afterCSS3() {
ANTLRParser compiler = new ANTLRParser();
String selector = "li::after {";
ANTLRParser.ParseResult result = compiler.parseSelector(selector, null);
assertValidSelector(result);
assertChilds(result.getTree(), LessLexer.EMPTY_COMBINATOR, LessLexer.SIMPLE_SELECTOR);
}
@Test
public void notPseudo() {
ANTLRParser compiler = new ANTLRParser();
String selector = "li:not(:only-child) { ";
ANTLRParser.ParseResult result = compiler.parseSelector(selector, null);
assertValidSelector(result);
}
@Test
public void notNumber() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("class#id[attr=32]:not(1) {", null);
assertValidSelector(result);
}
@Test
public void notAttribute() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("p:not([class*=\"lead\"]) {", null);
assertValidSelector(result);
}
@Test
public void stylesheetWithMultipleFormulas() {
String combined_stylesheet = "li:nth-child(4n+1),\n" +
"li:nth-child(-5n),\n" +
"li:nth-child(-n+2) {\n" +
" color: white;\n" +
"}";
ANTLRParser compiler = new ANTLRParser();
ParseResult result = compiler.parseStyleSheet(combined_stylesheet, null);
assertValid(result);
}
@Test
public void formulaAnb() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(4n+1) {", null);
assertValidSelector(result);
}
@Test
public void formulaAnMinusb() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(4n-1) {", null);
assertValidSelector(result);
}
@Test
public void formulaAn() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(4n) {", null);
assertValidSelector(result);
}
@Test
public void formulaMinusAn() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(-4n) {", null);
assertValidSelector(result);
}
@Test
public void formulaMinusN() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(-n) {", null);
assertValidSelector(result);
}
@Test
public void formulaMinusNMinus() {
ANTLRParser compiler = new ANTLRParser();
String selector = "li:nth-child(-n+2) {";
ANTLRParser.ParseResult result = compiler.parseSelector(selector, null);
assertValidSelector(result);
}
@Test
public void formulaEven() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(even) {", null);
assertValidSelector(result);
}
@Test
public void formulaEvenUppercase() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:NTH-CHILD(EVEN) {", null);
assertValidSelector(result);
}
@Test
public void formulaOdd() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:nth-child(odd) {", null);
assertValidSelector(result);
}
@Test
public void formulaOddUppercase() {
ANTLRParser compiler = new ANTLRParser();
ANTLRParser.ParseResult result = compiler.parseSelector("li:NTH-CHILD(ODD) {", null);
assertValidSelector(result);
}
}